//package com.kochiu.javaPasser.web.test.kafka;
//
//import java.util.HashMap;
//import java.util.List;
//import java.util.Map;
//import java.util.Properties;
//import java.util.concurrent.ExecutorService;
//import java.util.concurrent.Executors;
//
//import kafka.consumer.Consumer;
//import kafka.consumer.ConsumerConfig;
//import kafka.consumer.KafkaStream;
//import kafka.javaapi.consumer.ConsumerConnector;
//
///**
// * 详细可以参考：https://cwiki.apache.org/confluence/display/KAFKA/Consumer+Group+Example
// *
// * @author Fung
// *
// */
//public class ConsumerDemo {
//    private final ConsumerConnector consumer;
//    private final String topic;
//    private ExecutorService executor;
//
//    public ConsumerDemo(String a_zookeeper, String a_groupId, String a_topic) {
//        consumer = Consumer.createJavaConsumerConnector(createConsumerConfig(a_zookeeper,a_groupId));
//        this.topic = a_topic;
//    }
//
//    public void shutdown() {
//        if (consumer != null)
//            consumer.shutdown();
//        if (executor != null)
//            executor.shutdown();
//    }
//
//    public void run(int numThreads) {
//        Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
//        topicCountMap.put(topic, new Integer(numThreads));
//        Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = consumer
//                .createMessageStreams(topicCountMap);
//        List<KafkaStream<byte[], byte[]>> streams = consumerMap.get(topic);
//
//        // now launch all the threads
//        executor = Executors.newFixedThreadPool(numThreads);
//
//        // now create an object to consume the messages
//        //
//        int threadNumber = 0;
//        for (final KafkaStream stream : streams) {
//            executor.submit(new ConsumerMsgTask(stream, threadNumber));
//            threadNumber++;
//        }
//    }
//
//    private static ConsumerConfig createConsumerConfig(String a_zookeeper,
//                                                       String a_groupId) {
//        Properties props = new Properties();
//        props.put("zookeeper.connect", a_zookeeper);
//        props.put("group.id", a_groupId);
//        props.put("zookeeper.session.timeout.ms", "400");
//        props.put("zookeeper.sync.time.ms", "200");
//        props.put("auto.commit.interval.ms", "1000");
//
//        return new ConsumerConfig(props);
//    }
//
//    public static void main(String[] arg) {
//        String[] args = { "127.0.0.1:2181", "group-1", "page_visits", "12" };
//        String zooKeeper = args[0];
//        String groupId = args[1];
//        String topic = args[2];
//        int threads = Integer.parseInt(args[3]);
//
//        ConsumerDemo demo = new ConsumerDemo(zooKeeper, groupId, topic);
//        demo.run(threads);
//
//        try {
//            Thread.sleep(500000);
//        } catch (InterruptedException ie) {
//
//        }
//        demo.shutdown();
//    }
//}